EvaluateJavaScript

puelocesar

Hi, everybody! I just installed here Qt 4.7 SDK, but I'm having a problem with WebView. I want to test the method evaluateJavaScript, but I just can't get it to work. Here is my code:

@
import Qt 4.7
import QtWebKit 1.0

Rectangle {
id: rect
width: 700
height: 500

WebView {
    id: webview
    anchors.fill: parent
    url: "http://www.google.com"

    onLoadFinished: {
        console.log("loaded.");
        evaluateJavaScript("alerta('test!')")
    }
}

}
@

Any tip on what I'm doing wrong?

ps: I'm running it on Qt Creator on Windows 7 64bits
ps2: I know the js call "alerta" is wrong, but this forum won't let me save this post with the correct name, saying that I'm a spammer if I do that

puelocesar

Update: I made evaluateJavaScript work, but only when calling predefined js methods:

@webview.evaluateJavaScript("window.qml.qmlCall()")@

So, any tips on why can't I call default html/js methods like alert or document.getElementById?

mbrasser

Hi,

In the alert case, the onAlert signal handler of the WebView should be called. If you add
@onAlert: console.log(message)@
To the WebView in the code above, are you able to get the correct output?

Regards,
Michael

2beers

hi. I think the problem is this:

@evaluateJavaScript("alerta('test!')")@

if should be alter not alerta

@evaluateJavaScript("alert('test!')")@

puelocesar

Hi 2beers. I know it's wrong, but when I tried to create this forum post with the "alert" word, the system said it was a SPAM, and did not let me save it. That's why I wrote "alerta"

puelocesar

[quote author="mbrasser" date="1285648352"]Hi,

In the alert case, the onAlert signal handler of the WebView should be called. If you add
@onAlert: console.log(message)@
To the WebView in the code above, are you able to get the correct output?

Regards,
Michael[/quote]

That worked! But I still can't use other methods, like getElementById, like this:
@evaluateJavaScript("document.getElementById('body') . innerHTML = 'aaaa'")@

Just to be sure, I ran this on Firebug, and it works on www.google.com:
@document.getElementById('body') . innerHTML = 'aaaa'@

But it doesn't work with evaluateScript

mbrasser

I'm not sure what's happening. You could try the same test in QWebFrame (from C++) to see if it works as expected there (WebView just forwards the evaluation to it's internal QWebFrame)

aflegg

Did you ever get evaluateJavaScript working with document.getElementById?

I have:

@console.log("document = " + webView.evaluateJavaScript("document"))
console.log("field = " + webView.evaluateJavaScript("document.getElementById('txtDefaultLastName')"))
console.log("value = " + webView.evaluateJavaScript("document.getElementById('txtDefaultLastName').value"))@

...and get:

@document = [object Object]
field = undefined
value = undefined@